Fuel surcharge data is collected monthly from individual railroad websites. Fuel surcharges apply per mile per car. They are typically billed on top of tariff rates, but note that tariff- and contract-specific fuel surcharges may differ from the reported surcharge. For instance, BNSF publishes three separate fuel surcharge series, based on different strike prices. Their $1.25 strike price was in effect on some grain tariffs prior to March 2011, when the $2.50 strike price calculation went into effect. In February 2015, BNSF removed the fuel surcharge from its grain tariffs. In January 2021, BNSF added the fuel surcharge back to its grain tariffs at the $3.25 strike price. All three series are included in this dataset.